Microalgae Production Integrated with the Wastewater Treatment: A Management Approach

Leite, Luan de Souza; Daniel, Luiz Antônio

doi:10.1007/698_2022_862

Cited by 1 publication

(2 citation statements)

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“…− is converted into CO 2 by intracellular enzymes of carbonic anhydrase and there is a consequent release of OH − into the medium [25], which justifies the increase in pH at the beginning of the operations (Figure 2). During Stage 1, the pH of treatments 5:1, 10:1, and 20:1 had an ascending behavior until 24 h (probably because of photosynthetic activity), and then presented a decreasing profile, with some oscillations in the decline until the end of the operation.…”

Section: Microalgae Cultivationmentioning

confidence: 97%

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Effects of Bicarbonate Addition and N:P Ratio on Microalgae Growth and Resource Recovery from Domestic Wastewater

et al. 2023

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Nutrient availability plays a crucial role in microalgae growth in domestic wastewater. In this study, we investigated the impact of different nitrogen and phosphorus ratios (5:1, 10:1, and 20:1, m∙m−1), and the addition of inorganic carbon on microalgae growth and nutrient uptake from domestic wastewater. Microalgae biomass achieved values ranging from 0.54 to 1.41 g·L−1. The cultivation process had maximum removal efficiencies of 83.7% for soluble chemical oxygen demand (sCOD), 74.0% for total Kjeldahl nitrogen (TKN), and 100.0% for ammonia (NH3) and orthophosphate (PO43−). All the NH3 and PO43− concentrations from domestic wastewater without supplementation were completely removed on the fourth day of cultivation. Moreover, no significant differences in microalgae growth, and NH3 and PO43− removals were observed between the conditions with and without nutrient supplementation on the fourth day of cultivation. This study has shown the feasibility of growing microalgae in domestic wastewater without any nutritional supplementation. Further investigations are required to check the long-term performance, energy requirements, and economic viability of this system for wastewater treatment and the production of nutrient-rich biomass for agricultural applications.

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Section: Microalgae Cultivationmentioning

confidence: 97%

“…Most microalgae species have an optimum growth range between 20 and 30 • C and a light intensity between 33 and 400 µmol•m −2 •s −1 [25]. The light intensity applied in this study was approximately 261.9 µmol•m −2 •s −1 for all the PBRs.…”

Section: Microalgae Cultivationmentioning

confidence: 98%